I am looking for a telephoto zoom lens for wildlife/sports photography but don't know which one to choose from the below. All the reviews I have seen are both positive and negative, can anyone assist me in finding the right one? I want to use it on my Nikon D80...

idealy for sport you would take the 80-200mm or 70-200mmVR f/2.8. But considering that isnt an option, id stick with whichever those are closest to the Nikon 70-300mmVR. not sure of the prices of your listed lenses but thats about $670, and fantastic.